Operating mechanism for hoisting apparatus.



H. SAWYER.

Patented. Dec. 25, 191?.

2 SHEETS-SHEET I.

H. SAWYER; OPERATING MECHANISM FOR HOISTING APPARATUS.

APPLICATION FILED IULIJZ, I916- Patented Dec. 25.1917.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

HARRY SAWYER, OF MUSKEGON, MICHIGAN, ASSIGNOR TO SHAW ELECTRIC CRANE COMPANY, OF MUSKEGON, MICHIGAN, A CORPORATION OF MICHIGAN.

OPERATING MECHANISM FOR BTOISTING APPARATUS.

Specification of Letters Patent.

. Application filed July 12, 1916. Serial No. 108,831.

To all whom it may concern Be it known that I, HARRY SAWYER, a citizen of the United States, residing at Muskegon, in the county of Muskegon, State of Michigan, have made a certain new and useful Invention in Operating Mechanism for Hoisting Apparatus, of which the following is a specification.

This invention relates to operating mechanism for hoisting apparatus. 1 w

The object of the invention is to provide an operating mechanism for hoisting apparatus which is simple in structure, economical to manufacture and eflicient inoperation.

A further object of the invention is to provide an operating mechanism for hoisting apparatus including a hoisting drum and a racking drum and operating motors therefor with an intermediate planetary gearing system operating to drive the drums in the same direction, and with a desirable gear ratio between the hoisting motor and drum and, wherein, the drums are driven at the same peripheral speed, Whether the drums are of the same or of unequal diameters.

Other objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location, and relative arrangement of parts, all as will be more fully hereinafter set forth, as shown in the accompanying drawings, and finally pointed out in the appended claims.

Referring to the drawings:

Figure 1 is a view in top plan showing an operating mechanism for hoisting apparatus embodying the principles of my invention.

Fig. 2 is a broken view in section on the line 2, 2, Fig. 3, looking in the direction of the arrows.

Fig. 3 is a broken view in transverse section on the line 3, 3, Fig. 2, looking in the direction of the arrows.

The same part is designated by the same reference numeral wherever it occurs throughout the several views.

It is among the special purposes of my invention to provide a hoisting apparatus and operating mechanism therefor, which avoids the objectionable friction developed trolley as the same is racked in one direc-' tion or the other. In accordance with my invention I provide a suitable motor bed or frame 1, upon which are provided journals 2, 3, for the main operating shaft 4'. Suit ably geared to shaft 4, through the intermeshing gears 10 is a racking drum 5. A hoist drum 6 is geared to be driven through intermeshing gears 11, one of which is carried by a sleeve journaled to revolve upon said shaft 4. A planetary gear system is inclosed within a casing 7, and is operated by motors 12, 13, the motor 12 being the rack drum operating motor and the motor 13, being the hoist drum operating motor, although, as will be hereinafter explained, the operation of the rack motor 12, rotates not only the rack drum but also the hoist drum.

Suitablyconnected to rotate with shaft 4, and to be engaged and driven by a rack mo-, tor 12, is a gear wheel 8. Connected to rotate with spur gear 8 is a spur gear 9. A convenient arrangement is shown, to which, however, my invention is not to be limited or restricted, wherein the hub of spur gear 9 is keyed to shaft 4, and gear 8 is keyed upon the hub of gear 9. Loosely sleevedupon shaft 4 is a wheel lh'carrying an annular internally toothed gear 15, disposed in j uxtaposition to the spur gear 9. The hub of wheel 14 carries one member .of the intermeshing gears 11, through which the hoist drum 6 is operated. Loosely sleeved upon shaft 4; is a spur gear 16, arranged to be driven by the hoisting motor 13. Carried by spur gear 16 are studs 17, arranged in pairs. Pinions 18 are journaled upon the studs 17, each pair of pinions intermeshing with each other, one of said pinions of each pair meshing with spur gear 9, and the other of said pinions meshing with the juxtaposed annular gear 15.

With the construction above described it will be seen that when the rack motor 12, is

Patented Dec. 25, 1917;

operated, assuming the hoist motor to be out of operation, the rack drum 5 will be driven through the gear 8 and shaft 4, to which said gear is connected and the intermeshing gears 10 intermediate the shaft 4, and the rack drum. At the same time the gear 9 is also rotated, thereby axially rotating that member of each pair of pinions which meshes therewith, and through the associated pinions of each pair rotations are at the same time imparted to the annular gear 15, and hence through wheel 14, and its hub and the intermeshing gears 11, effecting a coincident rotation of the hoist drum 6. \Vhen, however, the rack motor is out of operation and the hoist motor is operated, gear 16 is rotated thereby carrying the pinions 18 around with it. This action through the intermeshing of one member of each pair of pinions with the gear 9, imparts axial rotation to said pinions and hence to the annular gear 15 and its carrying wheel 1%, and hence to the hoisting drum through gears 11, without, however, rotating the rack drum. Since the hoist drum is operated by both motors it is required to wind or unwind rope or cable for both the total hoist and the total rack movements, while the rack drum winds rope only for the rack movements. Therefore, while the drums 5, 6, may be made of the same diameter and the gear ratios of gearings 10 and 11, so proportioned as to give the same peripheral speeds to the drums 5, and 6, it will be found desirable to make the hoist drum oflarger diameter in order to enable it to wind more rope than the rack drum. In any case it will be seen that the drums 5and 6, are driven in the same direction and by suitably selecting the diameter 1 of the drums and the ear ratios of gearing 10 and 11, said drums, whether of the same diameters or not, may be driven at the same peripheral speeds.

arious changes in details of construction andarrangement will readily occur to persons'skilled in the art and still fall within the spirit and scope of my invention. I do not desire, therefore, to be limited or re- "stricted to the exact details shown and described.

Having now set forth the object and nature of my 1nvention,what I claim as new and useful, and of my own invention, and desire to secure by Letters Patent, is,-

1. In an operating mechanism for hoisting apparatus, avmain shaft, a rack drum and 'a hoist drum, a sleeve loosely journaled on said shaft, gearing intermediate said shaft and rack drum, gearing intermediate pendent operating motor to rotate said.

sleeve.

3. In an operating mechanism for hoisting apparatus, a rack drum and a hoist drum, a main operating shaft,gearing intermediate said shaft and rack drum, a sleeve journaled on said shaft and geared tosaid hoist drum, an internally toothed annular gear carried bysaid sleeve, a spur gear rotating with SfllClKSha ft, a spur gear loosely mounted on said shaft and carrying planetary gears to cooperate with said annular and spur. gears, and motors respectively geared to said shaft andloosely mounted 4. The combination with rack and hoist spur gear.

drums and motors and amain shaft, of a spur gear connected to Stud shaft to rotate therewith, said spur gear being driven by said rack motor, a juxtaposed internally toothed annular gear, intermeshmg p nions respectively meshed with said spur and am nular gears, a gear wheel carrying said pin- 1ons and geared to said h-o1stmotor, gear connections intermediate said annular gear and said hoistdrum. v

In testimony whereof- I have hereunto'set my hand,.in thepresence of the subscribing witnesses,- on this 29th-day-of June, A. D.

V HARRY SAWVYER. Witnesses:

P. J KNIPERs, T. C. -AKIN.

Copies of'this patent may be obtained for five cents each, by addressing the Commissioner of l ate nuc Washington, D. G. 

